Rotary fan.



W. SPARKS. ROTARY FAN.

APPLIUATION FILED S I'1PT.6,1910.

fir-ranmey take up '20 UNITED STATES PATENT FF vWILLIAM SPARKS, 0FJACKSON, MICHIGAN.

' ROTARY rm.

989,884. Specificatid To all who'm 'it may concern: 5

Be it known that I, WILLIAM SPARKs, of

Jackson in the county of Jackson, in. the State of Michigan, haveinvented new and useful Improvements in Rotary Fans, of which thefollowing, taken in connection with the accompany ng drawings, is a,full, clear, and exact description. v

This invention relates to certain improvements in rotary pulley drivenfans and refers more particularly to the connections between the fanblades and rotary driving element upon which they are mounted.

The main object is .to simplify the construction and reduce the cost ofmanufacture o'f'this class of fans and at the. same time to afford meanswhereby one of the cone bearings may be readily adjusted to wear andpositively locked in place by the web of the fan.

A further object is to positively lock such web to the driving shaft andto the adjacent cone by sliding'connections whereby the fan may beeasily and quickly removed or replaced.

Other objects and uses relating to specific' parts of the device will bethe following description.

In the drawings; Figure 1 is an end view of a rotary fan embodying thevarious features of myinvention. Fig. 2 is an enlarged verticalsectional view'through the journal brought out in bearing and drivingpulley, showing thecentral portions of the fan blades and connectionswith the rotary driving element. Fig.

3 is a face. view of the central portion of the.-

connecting Web for the fan blades showing particularly the centralangular openings and also the circular row of apertures surrounding thecentral opening for receiving the locking pins. F ig.4 is a sectional.View of modified form of drivingpulley.-

This fan comprises a hollow cylindrical support .-1 in which isjournaled a rotary source of power by a belt shaft -2- carrying. apulley -3 which is adapted to be driven from any available not shown.The

opposite ends .of the centrahbore of the cyllnder -1 through which theshaft 2- passes are enlarged for receiving suitable cup-bearings 4 whichare fixeeLtherei'n and have their inner ends curved inwardly andoutwardly to form --5. The ends of the shaft.@ are screw threaded forreceiving cone nuts 6 and -7, which are adjustable and are protake upwear.

annular ball races n of Patented Apr. 18, 1911. ApplicationfileiiSeptember 6, 191 0. Seria1No. 580,623.

vided with tapering inner ends forming annular bearings. foranti-friction balls 8. The outer ends of the cups extend laterallysomedistance from the cone bearings 6- and -7- forming intervening chambersin which are located dust proof packings 9 of felt or equivalentflexible material. These and also the balls 8 are held inoperativeposition in the cups by inner and outer retaining rings 10- and '-11.The inner retaining rings are seated in annular grooves l2 in the innerfaces of the cups in close proximity to the outer. faces of the ballsthereby. preventing accidental displacement of the rings and at the sametime retaining the balls in their cups when the cones are removed. Theouter rings llare held-between annular shoulders on the outer ends ofthevnuts or cones -6- and 7 and adjacent faces of the packings 9 Thecones -6 and 7- are threaded interiorly to engage the adjacent threadedportion of the shaft other or both of -2 so that one or the them may beadjusted to It is evident however, that it is only necessary to adjustone of them as, the cone 7, to accomplish this end.

The fan proper comprises a sheet metal web -l l having integral blades-l5 terminating at their outer ends in a continuous overturned edge,bead or rim 15-, which ':---is-reinforced -l6-, the rim or bead -15-servingas integral connection between the outer ends of the blades tohold the latter in fixed relation to each other. The web and blades arereinforced by an additional sheet metal plate or disk 17, having acentral web and radiating arms 18-, the latter being secured by suitablefastening means as rivets l9 to the blades -15 The blades. -l5 and theirreinforcing arms 18 are twisted or deflected at an angle to the plane ofrotation for the usual purpose. The object of the reinforcing plate-17is, to permit the main body of the fan to be made! of a thin sheet metalfor lightness and economy.

The portion of the shaft'2 to which the fan is secured is angular incross section and is preferably flattened at -20- on opposite sides,While the webs 14 and 17 are provided witlrsimilarly formed openings -21fittingupon the flattened portions of the shaft and are held in their byan inclosed wireadjusted position against the adjacent end of the cone 7by means of a nut 22- and washer 23 The flattened or ieccene tricportion of the shaft -2 extends inwardly from the outer end thereofbeyond the outer end face of the cone -7- so as to allow the webs 14-and --17 of the fan to follow up the adjustment of the cone'intaki'ng upwear, and also permitting the fan to be readily withdrawn fromthe shaftwhen the nut -22 is removed. The cone nut -7 is provided with one ormore,

in this instance two diametrically opposite pins .or studs 2 Lprojecting some distance beyond the outer end face thereof and adaptedto enter two of the circular series of apertures 25-- in the. webs l 4-and '17 which are arranged concentrically around the axis thereof. Thewebs 14- and '17- co;'acting with the pins or studs -24 serve to lockthe cone nuts -l against loosening by rotation.

' tightened to clamp the fan in place and to cause the web of the fan tolock the cone agalnst relative loosening. j

Another feature of my invent-ion consists In providing the pulley -3-'with a central web 28 having a central angular openmg 29 fitted snuglyupon an angular portion -30 of the sha ft2, opposite that to which thefan is secured, said pulley being heldin place against axial movementbetween an annular shoulder 3l and the clamping nut -32-.

What I claim is: I 1. In a rotary powerdriven fan, a stationary hub, arotary shaft journaled in the hub and provided with cone bearings one ofwhich is adjustable axially, fan-blades having a supporting web mountedon one end of the shaft adjacent to. the adjustable cone, means forlocking the web to the shaft to ro tate therewith and topermit. it to bemoved endwise relatively thereto, separate means for locking the web tothe adjustable cone to hold the latter in its adjusted position againstrelative n10vement, and movable means on the shaft to hold the webagainst axial movement when adjusted for use. 7

2. In combination with a stationary hub, a rotary threaded shaft passingcentrally through the hub, a cone-nut ad ustable on the threaded portionof the shaft, studs projecting axially from the outer end faceof thecone, a web fitted upon the shaft and provided with apertures receivingsaid studs, said web and shaft having eccentric engaging portions forlocking the web to the shaft to rotate therewith, a nut alsoengaging'the threaded portion of the shaft for holding the web inengagement with the studs,-'and fan blades" secured to the web.

3. In combination with a stationary hub and threaded shaft extending.centrally through the hub, a ulley on one end of the shaft, acone-nut'adjustableon the opposite end of the shaft, a stud projectingfrom the outer end face of the cone-nut, a web fitted upon the shaft andprovided with an aperture receiving said stud, said'web and shaft havingflattened bearing faces engaging each other to lock the shaft and web torotate together, and means for holding the web in operative engagementwith the stud against axial movement.

4. A rotary fan comprising a fixed hub and sha'ft'extending centrallythrough the hub and having its opposite ends threaded and provided withan ular portions, shoulders on said ends an pulleys slidably engagedwith one of the angular'end portions,

a nut 011 the adjacent end of theshaft for holding the pulley inengagement with its angular portion, a fan having a web fitted upon theadjacent ortion of the shaft to rotate therewith an slidable endwisethereon and a nut on the fan end of the shaft for holding said fanagainst outward endwise movement. a

In Witness whereof I have hereunto set my hand on this 22nd day ofAugust, 1910.

WILLIAM SPARKS.

Copies of this patent may be obtained-tor five cents eaoh, by addressingthe 3 Commissioner of Patents.

,Wa.shington, D. C. Y

